Brake Maintenance; Adjusting The Parking Brake - Toro 74978 Operator's Manual

Brake Maintenance

Adjusting the Parking Brake

Service Interval: After the first 100 hours
Every 500 hours thereafter
Check to make sure brake is adjusted properly. This procedure
must be followed after the first 100 hours or when a brake
component has been removed or replaced.
1. Drive the machine onto a level surface.
2. Disengage the blade control switch (PTO), move the
motion control levers to the neutral locked position
and set the parking brake.
3. Stop the engine, wait for all moving parts to stop, and
remove the key.
4. Raise the back of the machine up and support the
machine with jack stands.
DANGER
Mechanical or hydraulic jacks may fail to
support machine and cause a serious injury.
• Use jack stand when supporting machine.
• Do not use hydraulic jacks.
5. Remove the rear tires from the machine.
6. Remove any debris from the brake area.
7. Rotate the drive wheel release handle to the released
position. Refer to the Using the Drive Wheel
Release Valves section in Operation.
8. Measure the overall length of the compression spring.
The correct length should be between 1-1/2 and
1-9/16 inches (3.8 and 4.0 cm). If the spring length is
within this range, no adjustment is needed. If it is not,
proceed to step 9.
9. Hold the threaded rod end with a tool and adjust
the lock nut until the spring length is between 1-1/2
and 1-9/16 inches (3.8 and 4.0 cm) (Figure 72). Do
Not allow the cable to turn when the nuts are being
loosened.
Left Hand Brake Shown
1. Cable anchor
2. Hold threaded rod here
3. Measure
4. Lock nut
10. Disengage the park brake. Turn the wheel hub by hand
in both directions relative to the caliper; no drag of the
caliper pad on the wheel hub is desired.
11. If there is no movement between the hub and the
caliper then repeat the adjustment (drive release valves
must be in the released position on the hydros).
12. After adjusting the brakes on both sides of the mower,
cycle the brake handle a minimum of six times to allow
the cable to seat into the sheath and mounting tabs.
13. Recheck the spring length; engage the park brake and
repeat steps 8 through 11 if the length is not in the
correct range.
14. Rotate the drive wheel release handle to the operating
position. Refer to the Using the Drive Wheel
Release Valves section in Operation.
15. Install the rear tires and torque lug nuts between 90 and
95 ft-lb (122 and 129 N-m).
16. Remove jack stands.
48
Figure 72
5. Caliper
6. Compression spring
7. Threaded rod
8. Hub